Oxygen Cylinder

Purpose:

1. To determine the effects of mixing manganese dioxide and hydrogen peroxide.

Materials:

1. Large graduated cylinder
2. Powdered manganese dioxide
3. Hydrogen peroxide (3% or 30%--30% will give better results)

Procedure:

1. Place some powdered manganese dioxide at the bottom of the graduated cylinder.
2. Pour in some hydrogen peroxide.
3. A gas will evolve, which is oxygen. Place a glowing wooden splint in the gas the verify that it is oxygen.

Questions:

1. What happens to the hydrogen peroxide?
2. What is the reaction that occurs?